Concrete slabs and pavements represent a significant percentage of the built environment, they are the hardest working part of many structures, and the top surfaces are unformed and subject to negative aspects of bleed and curing. Hence it is not surprising that the highest incidence of in service concrete problems is with slabs and pavement. Overall slabs and pavements represent a high risk investment. The surface area and corresponding amount of steel reinforcing means that corrosion investigations on large slabs, bridge decks and concrete paving can be a time consuming and expensive exercise. Even with large surveys only a small proportion of the actual structure is generally investigated. (1) This article will present a recently released GPR system for use in concrete slab inspection called the Hi-Bright.
GPR Array for Condition Assessment of Concrete
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